ci: remove -Zbuild-std from sanitizer workflow

No need to rebuild std with sanitizers - we're testing our code, not Rust's.
This makes sanitizer jobs faster and cacheable.

Author: xdustinface

.github/workflows/sanitizer.yml

@@ -31,8 +31,6 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
-        with:
-          components: rust-src
       - uses: Swatinem/rust-cache@v2
         with:
           shared-key: "rust-cache-asan"
@@ -46,11 +44,11 @@ jobs:
           LSAN_OPTIONS: "fast_unwind_on_malloc=0"
         run: |
           # FFI crates (C interop)
-          cargo +nightly test -Zbuild-std --target x86_64-unknown-linux-gnu \
+          cargo +nightly test \
             -p key-wallet-ffi -p dash-spv-ffi -p dash-network-ffi --lib --tests
 
           # Core crypto crates (unsafe optimizations)
-          cargo +nightly test -Zbuild-std --target x86_64-unknown-linux-gnu \
+          cargo +nightly test \
             -p dashcore -p dashcore_hashes --lib --tests
 
   tsan:
@@ -59,8 +57,6 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
-        with:
-          components: rust-src
       - uses: Swatinem/rust-cache@v2
         with:
           shared-key: "rust-cache-tsan"
@@ -72,5 +68,5 @@ jobs:
           TSAN_OPTIONS: "second_deadlock_stack=1"
         run: |
           # Async crate with concurrent code
-          cargo +nightly test -Zbuild-std --target x86_64-unknown-linux-gnu \
+          cargo +nightly test \
             -p dash-spv --lib --tests